Analytical and numerical studies on heat transfer of a nanofluid over a stretching/ shrinking sheet with second-order slip flow model M. M. Rashidi 1,2 , A. K. Abdul Hakeem 3 , N. Vishnu Ganesh 3 , B. Ganga 4 , M. Sheikholeslami 5 and E. Momoniat - Rashidi,M. M.